Client-side and server-side unified validation

ABSTRACT

A system and method for validating code on a client-side and on a server-side in a Web environment utilizes a single validation code to validate JavaScript code on a client-side and JavaScript code on a server-side of a computer network system. The single validation code can help to correct errors in the client code and ensure the integrity of data stored on the server.

CROSS REFERENCE TO RELATED APPLICATION

This Application claims priority to U.S. Provisional Patent Application No. 60/991,764, filed on Dec. 3, 2007, which is hereby incorporated by reference in its entirety.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is related to development of Web-sites and Web-applications. More specifically, the present invention relates to validation of client side code and server-side code utilizing the same validation code.

2. Description of the Related Art

Incorrectly written code for a Web-application, Web-page or Web-site may not be rendered on a browser. HTML documents must be validated prior to publication of the content of the HTML document on the Web. Validated code, code that among other factors adheres to Web standards, allows a Web-page to load faster and is easier to maintain. Most current HTML documents require separate validation code for the client-side and for the server-side. For example if the client-side code is written in JavaScript and the server-side code is written in PHP, the client-side code is validated using JavaScript and server-side code is validated using PHP.

Prior to Rich Internet Applications, traditional Web applications involved a client-server architecture with all of the processing on the server side and the client-side used to display the HTML web-pages served by the server. Each time a user desired to view a new Web-page, a HTTP request was sent to the server and the requested Web-page was served to the Web browser on the client-side. Such a traditional system is shown in FIG. 1 with a Web-server 1000 on a server side receiving requests over the Internet 1005 from a Web-browser 1003 on a client-side.

Rich Internet Applications, such as Ajax, greatly improved on the traditional client-server architecture by allowing the client machine to dynamically render and partially refresh web pages based on an initial set of instructions from the server, user input, and small amounts of subsequent data dynamically requested from the server. As shown in FIG. 2, the client machine processes Ajax instructions to render a Web page for the user.

Early Web applications allowed a user's browser to send a request to a server. The server processed the request and responded to the browser with a Web page. When the user wanted to view a new page, another request was sent to the server and the server responded to the browser with a new Web page. Such a process resulted in a waste of bandwidth since much of the Web contents in the first Web page were also contained in the second web page. The need to resend the same information led to a much slower user interface of a Web application than that of a native application.

An emerging technology, called Ajax (Asynchronous and JavaScript XML), was developed for refreshing part of a page instead of refreshing the whole page on every interaction between the user and application. In an Ajax application, when a user submits a form in a page, a script program, usually a JavaScript program, resident on the Web browser receives the user's request and sends a XML (Extended Markup Language) HTTP (Hyper Text Transfer Protocol) request to the Web server in background so as to retrieve only the needed Web contents instead of the whole page and perform corresponding processing to partly refresh the page when receiving a response from the Web server. In this way, the application response time is shortened, because the amount of data exchanged between the Web browser and the Web server is greatly reduced. And the processing time of the Web server is saved because much of the processing is performed at the client side.

General definitions for terms utilized in the pertinent art are set forth below.

Ajax is the use of dynamic HTML, JavaScript and CSS to create dynamic and usually interactive Web sites and applications. A more detailed explanation of Ajax is set forth in Edmond Woychowsky, AJAX, Creating Web Pages with Asynchronous JavaScript and XML, Prentice Hall, 2007, which is hereby incorporated by reference in its entirety.

Applets or Java Applets are mini-executable programs named with the .class suffix and are placed on a Web page and provide interactive and multimedia uses.

Application Programming Interface (API) is a collection of computer software code, usually a set of class definitions, that can perform a set of related complex tasks, but has a limited set of controls that may be manipulated by other software-code entities. The set of controls is deliberately limited for the sake of clarity and ease of use, so that programmers do not have to work with the detail contained within the given API itself.

An Attribute provides additional information about an element, object or file. In a Document Object Model, an attribute, or attribute node, is contained within an element node.

Behavioral layer is the top layer and is the scripting and programming that adds interactivity and dynamic effects to a site.

Binding in a general sense is the linking of a library to an application program usually to prevent repetition of frequently utilized code.

Cascading Style Sheets (CSS) is a W3C standard for defining the presentation of Web documents.

Compiler is a computer program that translates a series of instructions written in one computer language into a resulting output in a different computer language.

Document Object Model (DOM) Element is an object contained in a Document Object Model (DOM). The term DOM is generally used to refer to the particular DOM held in the memory region being used by the Web browser. Such a DOM controls the Graphical Respondent Interface (GRI) or Graphical User Interface (GUI). The DOM is generated according to the information that the Web browser reads from the HTML file, and/or from direct JavaScript software instructions. Generally, there exists a unique DOM element for every unique HTML element. DOM elements are sometimes referred to as HTML/DOM elements, because the DOM element exists only because HTML code that was read by the Web browser listed some HTML element that had not previously existed, and thereby caused the Web browser to create that DOM element. Often specific elements of the greater set of HTML/DOM elements are identified by specifying an HTML/DOM checkbox element, or an HTML/DOM text input element. A more detailed explanation of the document object model is set forth in Jeremy Keith, DOM Scripting, Web Design with JavaScript and the Document Object Model, friendsof, 2005, which is hereby incorporated by reference in its entirety.

HyperText Markup Language (HTML) is a method of mixing text and other content with layout and appearance commands in a text file, so that a browser can generate a displayed image from the file.

Hypertext Transfer Protocol (HTTP) is a set of conventions for controlling the transfer of information via the Internet from a Web server computer to a client computer, and also from a client computer to a Web server.

Internet is the worldwide, decentralized totality of server computers and data-transmission paths which can supply information to a connected and browser-equipped client computer, and can receive and forward information entered from the client computer.

JavaScript is an object-based programming language. JavaScript is an interpreted language, not a compiled language. JavaScript is generally designed for writing software routines that operate within a client computer on the Internet. Generally, the software routines are downloaded to the client computer at the beginning of the interactive session, if they are not already cached on the client computer. JavaScript is discussed in greater detail below.

JSON is JavaScript Object Notation format, which is a way of taking data and turning it into valid JavaScript syntax for reconstituting an object at the other end of the transmission protocol.

MySQL is a relational database management system which relies on SQL for processing data in a database.

Parser is a component of a compiler that analyzes a sequence of tokens to determine its grammatical structure with respect to a given formal grammar. Parsing transforms input text into a data structure, usually a tree, which is suitable for later processing and which captures the implied hierarchy of the input. XML Parsers ensure that an XML document follows the rules of XML markup syntax correctly.

PHP is a scripting language that allows developers create dynamically generated Web pages, and is used for server-side programming.

Platform is the combination of a computer's architecture, operating system, programming language (PHP, JAVA, RUBY ON RAILS), runtime libraries and GUIs.

Presentation layer follows the structural layer, and provides instructions on how the document should look on the screen, sound when read aloud or be formatted when it is printed.

Rendering engine is software used with a Web browser that takes Web content (HTML, XML, image files) and formatting information (CSS, XSL) and displays the formatted content on a screen.

Serialization places an object in a binary form for transmission across a network such as the Internet and deserialization involves extracting a data structure from a series of bytes.

SQL (Structured Query Language) is a computer language designed for data retrieval and data management in a database.

Structural layer of a Web page is the marked up document and foundation on which other layers may be applied.

User is a client computer, generally operated by a human being, but in some system contexts running an automated process not under full-time human control.

Web-Browser is a complex software program, resident in a client computer, that is capable of loading and displaying text and images and exhibiting behaviors as encoded in HTML (HyperText Markup Language) from the Internet, and also from the client computer's memory. Major browsers include MICROSOFT INTERNET EXPLORER, NETSCAPE, APPLE SAFARI, MOZILLA FIREFOX, and OPERA.

Web-Server is a computer able to simultaneously manage many Internet information-exchange processes at the same time. Normally, server computers are more powerful than client computers, and are administratively and/or geographically centralized. An interactive-form information-collection process generally is controlled from a server computer, to which the sponsor of the process has access.

World Wide Web Consortium (W3C) is an unofficial standards body which creates and oversees the development of web technologies and the application of those technologies.

XHTML (Extensible Hypertext Markup Language) is a language for describing the content of hypertext documents intended to be viewed or read in a browser.

XML (Extensible Markup Language) is a W3C standard for text document markup, and it is not a language but a set of rules for creating other markup languages.

There are three types of JavaScript: 1) Client-side JavaScript; 2) Server-side JavaScript; and 3) Core JavaScript. Client-side JavaScript is generally an extended version of JavaScript that enables the enhancement and manipulation of web pages and client browsers. Server-side JavaScript is an extended version of JavaScript that enables back-end access to databases, file systems, and servers. Core JavaScript is the base JavaScript.

Core JavaScript includes the following objects: array, date, math, number and string. Client-side JavaScript and Server-side JavaScript have additional objects and functions that are specific to client-side or server-side functionality. Generally, any JavaScript libraries (.js files) created in core JavaScript can be used on both the client and the server without changes. Client-side JavaScript is composed of a Core JavaScript and additional objects such as: document, form, frame and window. The objects in Client-side JavaScript enable manipulation of HTML documents (checking form fields, submitting forms, creating dynamic pages) and the browser (directing the browser to load other HTML pages, display messages). Server-side JavaScript is composed of Core JavaScript and additional objects and functions for accessing databases and file systems, and sending email. Server-side JavaScript enables Web developers to efficiently create database-driven web applications. Server-side JavaScript is generally used to create and customize server-based applications by scripting the interaction between objects. Client-side JavaScript may be served by any server but only displayed by JavaScript-enabled browsers. Server-side JavaScript must be served by a JavaScript-enabled server but can be displayed by any browser.

Dinovo, United States Patent Publication Number 20020069255 for a Dynamic Content Delivery To Static Page In Non-Application Capable Environment discloses a system for incorporating dynamic content into a static page from a non-application capable server.

Mocket et al., United States Patent Publication Number 20010037359 for a System And Method For A Server-side Browser Including Markup Language Graphical User Interface, Dynamic Markup Language Rewriter Engine And Profile Engine describes a system and method for a server-side browser including markup language graphical user interface, dynamic markup language rewriter engine and profile engine. The system includes a user computer and a destination server computer separated by a server computer hosting a server-side browser (SSB). The SSB includes a markup language graphical user interface (MLGUI), a dynamic markup language rewriter engine (DMLRE) and a profiling engine (PE). The SSB may be configured as an intermediary infrastructure residing on the Internet providing customized information gathering for a user. The components of the SSB allow for controlling, brokering and distributing information more perfectly by controlling both browser functionality (on the client-side) and server functionality (on the destination site side) within a single point and without the necessity of incremental consents or integration of either side.

Cherry et al., United States Patent Publication Number 20060277250, for Methods And Systems For Checking Accessibility Of Web Applications discloses a proxy that intercepts HTTP requests sent by a Web browser to an application server to determine accessibility.

Pereira et al., United States Patent Publication Number 20080034404, for a Method And System For Validating Site Data discloses performing a comparison of an indication of site data to a site data criteria to validate the site data.

Lindhorst et al., U.S. Pat. No. 6,981,215 for a System For Converting Event-Driven Code Into Serially Executed Code, discloses an event-driven server model that uses active server pages that appear to other files as objects with associated method and properties for developing Web pages.

However, current technologies that operate Server-side JavaScript fail to offer complete interactions which are the hallmark of rich web sites and applications. A long-standing problem in Web development, and indeed in any client-server situation, is the need to have data validation code present both on the client and the server: validation on the client is important because it happens very fast and is a part of the GUI, which means that it can be very helpful to inform the user of any data errors and help the user to correct them; validation on the server is mandatory to ensure that, even if the client has been compromised, the integrity of the data on the server is assured. But because the client and the server run different validation code, there are two sets of validation functions to be kept in sync, and they are unlikely to remain so, plus one may be vulnerable in ways that the other is not.

BRIEF SUMMARY OF THE INVENTION

The Present Invention overcomes the obstacles of the prior art. With the present invention, the same validation code is designated to be available both on the client-side and the server-side. This may be because literally the same JavaScript code is available from the client and the server, or because proxy code is injected into the client that calls the same validation code used on the server. The aforementioned problem is therefore solved.

Note that this can continue to be the case even if the present invention is running on top of another server-side software such as PHP or Java. The present invention can be used to filter the data submitted from the client and validate it on the server of the present invention (with the same code used for client validation) before that data is made available to the underlying PHP or Java.

Proxies are not only generated by explicit developer command, but are also generated dynamically based on a set of rules and requirements for either server and/or client.

One aspect of the present invention is a method for validating code on a client-side and on a server-side in a web environment. The method includes providing a JavaScript code on a client-side. The method also includes providing a JavaScript code on a server-side. The method also includes validating both the JavaScript code on the client-side and the JavaScript code on the server-side with a single validation code.

The single validation code is preferably on the client-side and the server-side.

In practicing the method, a proxy-code is preferably injected into the JavaScript code on the client-side, the proxy code calling the single validation code on the serve-side.

The method also includes filtering code submitted from the client-side to the server-side. The method also includes validating the filtered code. The method also includes submitting the filtered code to a second server-side software. The second server-side software is JAVA, PHP, C#, PYTHON or RUBY.

Another aspect of the present invention is a web environment. The web environment includes a web-server comprising a server-side JavaScript code, a web-browser comprising a client-side JavaScript code, and a single validation code for validating both the server-side JavaScript code and the client-side JavaScript code.

Another aspect of the present invention is a system for validating code on a client-side and on a server-side in a web environment. The system includes a web-server comprising a server-side JavaScript code, a web-browser comprising a client-side JavaScript code, and a single validation code for validating both the server-side JavaScript code and the client-side JavaScript code.

Another aspect of the present invention is a computer program product comprising a JavaScript code for a HTML document and means for validating the JavaScript for the HTML document on a client-side and a server-side.

To understand the differences between the server and browser sides, it's important to keep in mind the page lifecycle. The page request from the browser is received by the Web server, which fetches the appropriate HTML document (either from the file system or perhaps from another “handler” such as PHP or Ruby or Java). The Web server (Apache server) then feeds the document to the script server of the present invention, which begins to parse the HTML document.

The resulting HTML page is sent back to the browser as the response to the browser's request. The browser begins to parse the HTML, building up the DOM. When the browser encounters <script> tags the browser not only adds them to the DOM but also executes them. External JavaScript code or any other content may also be loaded. The onload event fires. Of course the page is progressively rendered throughout much of this flow, and also the user can interact with it.

Callbacks from the browser to server-side functions are handled via XMLHttpRequests. When the script server receives such a request, it creates a new, empty document (unless configured to use a different static document). The script server retrieves the saved functions that are needed to be made available during callbacks to this page. If a function called oncallback is found, it is executed. This is usually used to create the environment needed during a callback, if the saved functions are not enough. The callback function itself is executed. Finally, the result of that execution is packaged and returned as the response to the XMLHttpRequest.

While a DOM is available during callback processing, it is not serialized as HTML and returned as the response, as it was during the “regular” (non-callback) page processing flow. The DOM on script server and the DOM on the browser typically are not synchronized. Both are created from the same HTML source, but they are often subject to processing by different JavaScript code, and both come to life at different points in the page lifecycle: the DOM on the script server exists temporarily when the page is processed by the script server, and is eliminated after it's been serialized into the HTML sent to the browser; the DOM in the browser is built, on the browser, from that HTML, and is the DOM that's rendered to the user and with which the end-user interacts.

While script server and the browser may well share some code (e.g. when using runat=“both”), usually the JavaScript code designated to run on script server and interacting with the script server DOM is different than the code designated to run on the client. The latter exists e.g. as a <script> tag in the script server DOM but is not executed in script server.

Remember that the only things sent to the browser at the end of page processing is what's actually in the DOM, and what the script server of the present invention has added such as proxies, clientData, and injected scripts. For example, if a developer added an expando property, which is an in-memory change to the DOM that will not get serialized, it will not appear on the client side.

var div=document.createElement (“div”);

div.id=“myDiv”;

document.body.appendChild(div);

document.getElementById(“myDiv”).userId=123;

On the browser the div is present, with an id of “myDiv”, but without a “userId” property. For this same reason, setting event handlers programmatically rather than in the DOM will not translate to DOM changes and hence will not propagate to the browser. For example with a button: <input type=“button” id=“myButton” value=“Click me”>

A developer could add an onclick=“ . . . ” attribute to the tag, but this does not assist with adding the event handler programmatically. The script server of the present invention provides Jaxer.setEvent (domElement, eventName, handler) function that “does the right thing” in the script server as well as on the browser. var btn=document.getElementById(“myButton”); function sayHi( ) {alert (“hi”)} sayHi.runat=“client”; Jaxer.setEvent(btn, “onclick”, sayHi);

The function used as the event handler should be made available to the browser. When setEvent is executed on the server, as above, it results in the following change to the myButton element: <input type=“button” id=“myButton” value=“Click me” onclick=“sayHi( )”> This is sent to the browser since it is a DOM change. If the function passed into setEvent has no name, its body (source) is used as the value of the attribute: var btn=document.getEleemntById(“myButton”); Jaxer.setEvent(btn, “onclick”, function( ) {alert(“hi”); });

This results in the following: <input type=“button” id=“myButton” value=“Click me” onclick=“(function( ) {alert(\“hi\); }) ( )”>

Which is useful for short functions but is easier to pass in the code to execute as a string: var btn=document.getEleemntById(“myButton”);Jaxer.setEvent(btn, “onclick”, “alert(‘hi’)”);

Which results in:<input type=“button” id=“myButton” value=“Click me” onclick=“alert(‘hi’)”>

The environment of the present invention is preferably based upon the very same Mozilla engine which powers Firefox 3. This means that, for the most part, DOM interaction in the server using the present invention is the same as interacting with the DOM in a Web browser. It parses and executes pages progressively, building up the DOM as it goes along, and allowing JavaScript to interact with whatever DOM has already been built up at the time the JavaScript executes. Any document.write( ) calls will write to the DOM immediately following the current location on the page. The JavaScript that is part of a page, and loaded into the page, executes within the context of the global window object. For each request at the server, the present invention preferably provides a document object model. This DOM (which we'll refer to as DOM1) can be used to insert data and otherwise transform the page before it is first returned to the browser. You interact with and manipulate the DOM much the same as you would in the browser. Some third party Javascript toolkits, such as jQuery, can also be used to modify this DOM. The document is accessible through the document object, and the root element of the DOM is accessible through the document.documentElement object. To ensure that element properties are serialized properly when the DOM is returned to the browser, use element.setAttribute(“attr”, “value”) rather than element.foo=“value”. Form element values set with formElement.value [code font] are an exception; they'll still be serialized as expected. To attach an event handler to an element, preferably use the special Jaxer method Jaxer.setEvent( ). Example: Transforming the DOM.

<script type=“text/javascript” runat=“server”>

window.onserverload=function( ){

var textNode=document.createTextNode(“wocka wocka wocka”);

var element=document.getElementById(“container”);

element.appendChild(textNode);

};

</script>

A developer can manipulate the DOM in the API's, for example by using the following:

<script runat=“server”>

Document.getElementById(‘useBillingAddrChkbox’).checked=

-   -   Jaxer.session.get(‘userSessionBillingAddrValue’);         </script>

Having briefly described the present invention, the above and further objects, features and advantages thereof will be recognized by those skilled in the pertinent art from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a block diagram of a web system of the prior art.

FIG. 2 is a block diagram of a web system of the prior art.

FIG. 3 is a block diagram of the system of the present invention during a callback.

FIG. 4 is a block diagram of the system of the present invention during a normal process.

FIG. 4A is a block diagram of the system of the present invention during a normal process.

FIG. 5 is a block diagram of a callback process.

FIG. 6 is a Web-page generated by the code.

FIG. 7 is a block diagram of the server of the system of the present invention.

FIG. 7A is a block diagram of the user-computer of the system of the present invention.

FIG. 8 is a flow chart of a general method of the present invention.

FIG. 9 is a flow chart of a more specific method of the present invention.

FIG. 10 is a flow chart of a more specific method of the present invention.

FIG. 11 is a block diagram of a prior art application stack illustrating the interactions between the client side and the server-side.

FIG. 12 is a block diagram of an application stack of the present invention illustrating the interactions between the client side and the server-side.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIG. 3 a system 20 of the invention generally includes a server-side 25, a client side 30 and a network or preferably the Internet 35. The server-side 25 includes a web-server 40, a handler 45 and a JavaScript server 50 preferably having a server-core 55 and a server-framework 60. The client-side 30 includes a Web-browser 65 has a client-framework 70, a client-side JavaScript code 75 and a rendering engine 80. The server-framework 60 accesses filesystems 85 and databases 90, as well as the Internet 35. A more detailed description of the abilities of the running JavaScript on the server-side and client-side is disclosed in Colton et al., U.S. patent application Ser. No. 12/270,817, filed Nov. 13, 2008 for A Web Server Based On The Same Paradigms As Web-Clients, which is hereby incorporated by reference in its entirety. An additional detail of facilitated server-side to client-side communications is disclosed in Colton et al., U.S. patent application Ser. No. 12/276,327, filed Nov. 22, 2008 for a System And Method For Facilitated Client-Side To server-Side Communications, which is hereby incorporated by reference in its entirety.

In FIG. 3, the system 20 is shown during a callback operation. The callback begins at the client-side JavaScript code 75 with a callback request sent to the client-framework 70. A HTTP GET/request is transmitted over the Internet 35 to the server-side 25, and received at the Web-server 40. The HTTP GET/request is sent to the server-core 55 which sends the HTTP GET/request as a callback to the server-framework 60. The server-framework 60 receives the callback, deserializes, performs the get functions, invokes, serializes and sends the response to the callback to the server-core 55. The server-core 55 sends the response to the Web-server 40 which sends the response over the Internet 35 to client-framework 70 on the Web-browser 65.

In FIG. 4, the system 20 is shown during a normal process. The process begins with a HTTP GET/request for a Web-page sent over the Internet 35 from the Web-browser 65 on the client-side 30 to the server-side 25. The HTTP Request is sent to the handler server 45. The HTML Web-page is then sent to the script server architecture 50. The server-core 55 of the script server architecture 50 parses the HTML Web-page to create a HTML DOM of the HTML Web-page. The server-core 55 also parses and interprets the JavaScript of the HTML Web-page. The server-framework 60 accesses databases 90 and filesystems 85 to respond to the Requests for the HTML Web-page. The server-framework 60 also injects proxies to modify the HTML Web-page. The server-core 55 serializes the DOM back to the HTML Web-page and the web-server 40 transmits the HTML Web-page to the client-side 30 where the Web-browser 65 renders the HTML Web-page for display for a user. As shown in FIG. 4A, a Web server (e.g., apache server) 41 receives a request from the client-side. The request 67 is sent to the handler server (PHP, Ruby or Java language) 45. The handler server 45 feeds the HTML document to script server-core 55 which begins to parse the HTML document thereby building the DOM tree for the HTML document on the server-side. Events and callbacks are sent to the script server-framework 60. The script server adds <script> tags to the DOM and executes them if the <script> has a runat attribute that indicates the <script> should be run on the server. During the parsing and execution, external content from filesystems 85, databases 90, and the like are fetched and loaded into the HTML document. After the DOM is loaded, the onserverload event is fired from the script server framework 60. The script server architecture post-processes the DOM to perform its built in logic and prepare the DOM for transmission to the client side. This post-process includes removing <script> block meant only for the server, replacing function to be proxied with proxies, saving functions that should be available as callbacks, and the like. The DOM is serialized back to HTML, and the HTML is streamed back via the web server 41 to the browser. A more detailed explanation of event-driven JavaScript architecture is set forth in Colton et al., U.S. patent application Ser. No. 12/273,539, filed on Nov. 18, 2008, for a Flexible, Event-Driven JavaScript Server Architecture, which is hereby incorporated by reference in its entirety. A more detailed explanation of on-the-fly processing is set forth in Colton et al., U.S. patent application Ser. No. 12/276,337, filed on Nov. 22, 2008, for a System And Method For On-The-Fly, Post-Processing Document Object Model Manipulation, which is hereby incorporated by reference in its entirety.

FIGS. 11 and 12 illustrate the difference in the application stacks between the prior art and the present invention. In both FIGS. 11 and 12, a client-side is designated 30 includes the HTML/DOM, CSS and JavaScript. In both FIGS. 11 and 12, arrow 91 is a request, arrow 92 is a response and arrow (both directions) 93 is a callback. The server-side 25 is the difference. The server-side 25 of the prior art is PHP, Java, RoR and C#. The server-side of the present invention is HTML/DOM, CSS and JavaScript. In the prior art, FIG. 11, Callbacks 93 require that the client-side 30 wrap, send, receive and unwrap the callback while the server-side 25 is required to receive, unwrap, run, wrap and send the callback. In the present invention, callbacks 93 are handled via XMLHttpRequests. When the server-side receives the request, the script-server architecture preferably creates a new, empty HTML document. The script-server architecture retrieves to this HTML document the saved functions needed to be made available during the callback. If a function designated oncallback is located, it is executed in order to create an environment needed during a callback, especially if the saved functions are not sufficient. Then, the callback function is executed and the results of the execution are packaged and returned as the response to the XMLHttpRequest.

As shown in FIG. 5, the present invention allows the server 50 to execute the JavaScript functions that are set to runat=“server” or runat=“both”. These functions might call databases, file systems, communicate across network sockets, or get session data. And since the server-side engine has a HTML DOM just like the browser, the HTML page can be manipulated through standard DOM APIs and your favorite Ajax libraries. The present invention also has session objects that can be used to persist data for users during a session or transaction. Any functions set to runat=“server” are stripped from what gets sent to the browser 65. Specifically at 1, the page executes on the server 50 and a resulting HTML page is sent to the browser 65. A more detailed description of the runat function is set forth in Colton et al., U.S. patent application Ser. No. 12/270,868, filed on Nov. 14, 2008, for a System And Method For Tagging Code To Determine Where The Code Runs, which is hereby incorporated by reference in its entirety.

After server 50 sends the resulting HTML page to the browser 65, at 2 the browser 65 interprets the HTML page and executes the JavaScript within the HTML page. If JavaScript functions tagged to runat=“server-proxy” are included, then the present invention automatically strips out the bodies of those functions and replaces the bodies with a new functions by the same name that know how to invoke the original function on the server 50 using Ajax calls and return the result either synchronously or asynchronously. Ajax communications do not need to be written using the present invention. Any functions not tagged with a runat attribute or set to runat=“client” or runat=“both” are processed by the browser 65.

Any functions set to runat=“server-proxy” can now be called from the browser 65. The function is called as if it were running on the browser 65, and the present invention, automatically via XHR communications with the server 50, marshals the parameters to the server 50 where the function executes (calling databases, getting info from the session data, etc. . . . ) and returns the result to the browser 65. The “server-proxy” functions can be invoked either synchronously or asynchronously. At 3, the browser 65 calls the server 50 asynchronously for new information.

The server computer program of the present invention is pre-configured for preferable use as a plug-in to the APACHE 2.x web server. To provide standards-compliant JavaScript and DOM capabilities server-side, the server computer program is built on the MOZILLA engine, which is the same engine used in the popular FIREFOX browser. The server computer program of the present invention is layered into APACHE as an input and output filter for use to modify dynamic pages created by other languages, such as PHP or Ruby.

The server computer program of the present invention is preferably a combination of C/C++ “Core” code and a server-side JavaScript “Framework.” The server-core 55 provides the JavaScript parser and runtime, HTML parser and DOM engine, and an event architecture that calls the server-framework 60 as the document is being processed on the server-side 25. The server-framework 60 provides the logic, for example deciding which code to run on the server-side 25 and which on the client-side 30, creating proxies on the client-side 30 for callable server-side functions, serializing and deserializing data, and other related activities. A more detailed description of generating proxies is set forth in Colton et al., U.S. patent application Ser. No. 12/275,182, filed on Nov. 20, 2008, for a System And Method For Auto-Generating JavaScript Proxies And Meta-Proxies, which is hereby incorporated by reference in its entirety. Further discussions on proxy generation are set forth in Colton et al., U.S. patent application Ser. No. 12/275,213, filed on Nov. 20, 2008, for a Single Proxy Generation For Multiple Web Pages, which is hereby incorporated by reference in its entirety. A more detailed description of accessing the DOM on the server-side is set forth in Colton et al., U.S. patent application Ser. No. 12/277,336, filed on Nov. 22, 2008, for a System And Method For Accessibility Of Document Object Model And JavaScript By Other Platforms, which is hereby incorporated by reference in its entirety.

On the server side 25, a developer's JavaScript environment is enhanced by the server-framework 60, which provides access to the database (e.g., MySQL), file system, network, the HTTP Request and Response data, and the external server-side platforms such as Java, PHP, and Ruby.

An example of code written by a developer and prior to processing by the present invention is set forth below.

<html>  <head>   <title>Tasks</title>   <style>    body { font: 9pt Arial; float: left; }    .tasks {background-color: #f0f0ff; padding: 8px;}    .new-task {Padding-bottom: 8px;}    .task {Padding: 4px; }   </style>   <script type=”text/javascript” runat=”server”>     Var sql =“CREATE TABLE IF NOT EXISTS tasks ( “ +      “ id int (11) NOT NULL,” +      “description varchar (255),”+      “created datetime NOT NULL” +      “) ENGINE=InnoDB DEFAULT CHARSET=utf8;     Aptana.DB.execute(sql);     Window.onserverload = function( )     {     var resultSet = Aptana.DB.execute(“SELECT * FROM tasks ORDER BY created”);    for (var i=0; i<resultSet.rows.length; i++)    {     var task = resultSet.rows[i];     addTask(task.description, task.id);    }   }   function saveTask(id, description)   {    var resultSet = Aptana.DB.execute(“SELECT * FROM tasks WHERE id = ?”, [id]);    if (resultSet.rows.length > 0) // task already exists    {     Aptana.DB.execute(“UPDATE tasks SET description = ? WHERE id = ?”,      [description, id]);    }    else // insert new task    {     Aptana.DB.execute(“INSERT INTO tasks (id, description, created) ” +      “VALUES (?, ?, NOW( ))”,      [id, description]);    }   }   saveTask.proxy = true;   function $(id) { return document.getElementById(id); }   $.runat = “both”;   function addTask(description, id)   {    var newId =id || Math.ceil(1000000000 * Math.random( ));    var div = document.createElement(“div”);    div.id = “task_” + newId;    div.className = “task”;    var checkbox = document.createElement(“input”);    checkbox.setAttribute(“type”, “checkbox”);    checkbox.setAttribute(“title”, “done”);    checkbox.setAttribute(“id”, “checkbox_” + newId);    Aptana.setEvent(checkbox, “onclick”, “completeTask (“ + newId +”)”);    div.appendChild(checkbox);    var input = document.createElement(“input”);    input.setAttribute(“type”, “text”);    input.setAttribute(“size”, “60”);    input.setAttribute(“title”, “description”);    input.setAttribute(“id”, “input_” + newId);    input.setAttribute(“value”, description);    Aptana.setEvent(input, “onchange”, “saveTask(“ + newId +”, this.value)”);    div.appendChild(input);    $(“tasks”).insertBefore(div, $(“tasks”).firstChild);    if (!Aptana.isOnServer)    {     saveTask(newId, description);    }   }   addTask.runat = “both”;   function completeTask(taskId)   {    var div = $(“task_” + taskId);    div.parentNode.removeChild(div);    deleteSavedTask(taskId);   }   completeTask.runat = “client”;   function deleteSavedTask(id)   {    Aptana.DB.execute(“DELETE FROM tasks WHERE id = ?”, [id]);   }   deleteSavedTask.proxy = true;   </script>  </head>  <body>   <h2>Tasks To Do</h2>   <div><i>Any changes should be automatically saved to your database!</i><br/><br/></div>   <div class=“new-task”>    New:    <input type=“text” id=“txt_new” size=“60”>    <input type=“button” value=“add” onclick=“addTask($(‘txt_new’).value)”>   </div>   <div id=“tasks” class=“tasks”>  </div>  </body> </html>

Processing of the code by the present invention results in the code being formatted as set forth below:

<html>   <head>      <script src=“/aptana/framework.js?version=0.1.1.759” type=“text/javascript”></script>  <script type=“text/javascript”>Aptana.clientData = Aptana.Serialization.fromJSONString(‘{ }’);</script>  <script type=“text/javascript”>Aptana.Callback.id =  −1407728339;</script>  <title>Tasks</title>  <style>   body {    font: 9pt Arial;    float: left;   }   .tasks {    background-color: #f0f0ff;    padding: 8px;   }   .new-task {    padding-bottom: 8px;   }   .task {    padding: 4px;   }  </style>  <script type=“text/javascript”>   function $(id)   {    return document.getElementById(id);   }   function addTask(description, id)   {    var newId = id || Math.ceil(1000000000 * Math.random( ));    var div = document.createElement(“div”);    div.id = “task_ ” + newId;    div.className = “task”;    var checkbox = document.createElement(“input”);    checkbox.setAttribute(“type”, “checkbox”);    checkbox.setAttribute(“title”, “done”);    checkbox.setAttribute(“id”, “checkbox_” + newId);    Aptana.setEvent(checkbox, “onclick”, “completeTask (“ + newId + ”)”);    div.appendChild(checkbox);    var input = document.createElement(“input”);    input.setAttribute(“type”, “text”);    input.setAttribute(“size”, “60”);    input.setAttribute(“title”, “description”);    input.setAttribute(“id”, “input_” + newId);    input.setAttribute(“value”, description);    Aptana.setEvent(input, “onchange”, “saveTask(“ + newId + ”, this.value)”);    div.appendChild(input);    $(“tasks”).insertBefore(div, $(“tasks”).firstChild);    if (!Aptana.isOnServer)    {     saveTask(newId, description);    }   }   function completeTask(taskId)   {    var div = $(“task_” + taskId);    div.parentNode.removeChild(div);    deleteSavedTask(taskId);   }   function saveTask( )   {    return Aptana.Callback.invokeFunction.call(null, “saveTask”, arguments);   }   function saveTaskAsync(callback)   {    return Aptana.Callback.invokeFunctionAsync.call(null, callback, “saveTask”, arguments);   }   function deleteSavedTask( )   {    return Aptana.Callback.invokeFunction.call(null, “deleteSavedTask”, arguments);   }   function deleteSavedTaskAsync(callback)   {    return Aptana.Callback.invokeFunctionAsync.call(null, callback, “deleteSavedTask”, arguments);   }  </script>  </head>  <body>   <h2>Tasks To Do</h2>   <div>    <i>Any changes should be automatically saved to    your database!</i>    <br>    <br>   </div>   <div class=“new-task”>    New:<input id=“txt new” size=“60” type=“text”><input value=“add”onclick=“addTask($(‘txt_new’).value)” type=“button”>   </div> <div id=“tasks” class=“tasks”> </div> </body> </html>

FIG. 6 is a screen display 99 of the code set forth above.

As shown in FIG. 7, a server-computer 2000 contains server architecture 50. The server-architecture 50 includes the server-core 55 and the server-framework 60. The server-core 55 includes a JavaScript parser 95. The server-computer 2000 is preferably a conventional server-computer available from IBM, HP, APPLE, DELL, and SUN.

As shown in FIG. 7A, a user-computer 2002 contains a Web-browser 65. The Web-browser 65 preferably includes the client framework 70, client-side JavaScript code 75 and the rendering engine 80. The user-computer 2002 is preferably a conventional user-computer such as a PC available from HP, DELL, and GATEWAY, or a MAC available from APPLE. The Web-browser 65 is preferably MICROSOFT INTERNET EXPLORER, NETSCAPE, APPLE SAFARI, MOZILLA FIREFOX, or OPERA.

A general method 100 of the present invention is shown in FIG. 8. At block 102, a single block of JavaScript code having a runat attribute of both is provided on a server-side. At block 104, the single block of JavaScript code is run on the server-side. At block 106, the single block of JavaScript code is called to the client-side. At block 108, the single block of JavaScript code is run on the client-side. Preferably the single block of code is a validation code. The runat attribute of both means single block of code can run on both the server-side and the client-side.

A more specific method 200 of the present invention is shown in FIG. 9. At block 202, a JavaScript code of a HTML document is provided on a client-side. At block 204, a JavaScript code of the HTML document is provided on a server-side. At block 206, both the JavaScript code on the client-side and the JavaScript code on the server-side are validated with a single validation code.

A more specific method 300 of the present invention is shown in FIG. 10. At block 302, a proxy code is injected into a JavaScript code of a HTML page. The proxy code calls a single validation code on a server-side for validating a JavaScript code on the server-side. At block 304, the JavaScript code with the proxy code is provided on a client-side. At block 306, the proxy code calls the single validation code on the server-side. At block 308, the single validation code of the server-side validates the JavaScript code on the client-side.

With the present invention, a developer can also tag any function or block of functions to run on both the server and the browser. Developers can write logic once, and it can be executed from either location. One ideal use of this is data validation. A developer can validate forms on the client to provide instant user feedback, and once the form is successfully submitted, validate the form again on the server to ensure its integrity, using the exact same logic with no additional code rewriting, and no getting the client-side code and the server-side code out of sync and possibly opening security holes. The following is a validation code:

<script runat=“both”>

function validate CreditCard(number) {

if(! . . . ) throw new Error (“ . . . ”);

}

</script>

From the foregoing it is believed that those skilled in the pertinent art will recognize the meritorious advancement of this invention and will readily understand that while the present invention has been described in association with a preferred embodiment thereof, and other embodiments illustrated in the accompanying drawings, numerous changes modification and substitutions of equivalents may be made therein without departing from the spirit and scope of this invention which is intended to be unlimited by the foregoing except as may appear in the following appended claim. Therefore, the embodiments of the invention in which an exclusive property or privilege is claimed are defined in the following appended claims. 

We claim:
 1. A computer implemented method for validating code on a client-side and on a server-side in a web environment, the method comprising: providing a JavaScript code on a client-side; providing a JavaScript code on a server-side; and validating both the JavaScript code on the client-side and the JavaScript code on the server-side with a single validation code on the client-side and the server-side; injected a proxy code into the JavaScript code on the client-side, the proxy code calling the single validation code on the server-side; filtering code submitted from the client-side to the server-side; validating the code that has been filtered; and submitting the code that has been filtered to a second server-side software.
 2. The method according to claim 1 wherein the second server-side software is implemented in JAVA, PHP, C#, PYTHON or RUBY programming language.
 3. A web environment comprising: a web-server comprising a web-server processor running a server-side JavaScript code; and a single validation code on the client-side and the server-side, the single validation code validating the server-side JavaScript code and client-side JavaScript code included in a web browser running on a client processor; a proxy code injected into the client-side JavaScript code, the proxy-code calling the single validation code on the server-side; and a code on a client-side that is filtered and submitted to the server-side wherein the code is validated and submitted to a second server-side software.
 4. The web environment according to claim 3 wherein the second server-side software is implemented in JAVA, PHP, C#, PYTHON or RUBY programming language.
 5. A system for validating code on a client-side and on a server-side in a web environment, the system comprising: a web-server comprising a web-server processor running a server-side JavaScript code for a HTML document; a single validation code on the client-side and the server-side, the single validation code validating the server-side JavaScript code and client-side JavaScript code included in a web browser running on a client processor; a proxy code injected into the client-side JavaScript code, the proxy-code calling the single validation code on the server-side; and a code on a client-side that is filtered and submitted to the server-side wherein the code is validated and submitted to a second server-side software.
 6. The system according to claim 5 wherein the a second server-side software is implemented in JAVA, PHP, C#, PYTHON or RUBY programming language.
 7. The system according to claim 5 further comprising a network.
 8. A system according to claim 5 further comprising a JavaScript architecture in a Web-server.
 9. A computer implemented method comprising: injecting proxy code into a JavaScript code of an HTML document for on a client-side, the proxy code comprising code that makes a call to a validation code at a server-side; providing to the client-side the HTML document comprising the proxy code that makes the call to the validation code at the server-side; in response to the call, validating data input to the HTML document at the client-side with the validation code at the server-side; after the validating data input to the HTML document, receiving a submission of the HTML document; and validating the submission with the validation code at the server-side, wherein the validation code for the validating the submission is the same validation code for the validating data input to the HTML document at the client-side filtering code submitted from the client-side to the server-side; validating the code that has been filtered; and submitting the code that has been filtered to a second server-side software.
 10. The method of claim 9 wherein the validation code for the validating the submission comprises logic, and the validation code for the validating the data input to the HTML document at the client-side comprises the same logic.
 11. The method of claim 9 wherein the validation code for the validating the submission is identical to the validation code for the validating the data input to the HTML document at the client-side.
 12. The method of claim 9 wherein executing the validation code at the server-side throws an error when the data input to the HTML document at the client-side is invalid.
 13. The method of claim 9 wherein the validation code comprises a <script> tag. 